Table 2.

Results From the Hierarchical Regression Analysis Predicting the Velocity of the First Movement Unit During Reaching

Step and predictor	b	SE (b)	β
Step 1: R2 = .06, F(4, 48) = 0.70
Fine motor skills	–138.39	126.98	–0.17
Gross motor skills	89.56	64.87	0.22
Age (days)	–0.30	1.48	–0.03
Gender	–14.21	25.87	0.08
Step 2: R2 = .26, F(7, 45) = 2.29*
Fine motor skills	–66.32	118.99	–0.08
Gross motor skills	41.20	60.90	0.10
Age (days)	–1.35	1.42	–0.13
Gender	6.25	24.74	0.04
Simple inhibition	2.23	1.06	0.29*
Working memory	42.81	16.49	0.35*
Complex inhibition	16.76	17.27	0.13

Note: The Vineland Scales of Adaptive Behavior (Sparrow, Cicchetti, & Balla, 2005) were used to assess fine and gross motor skills.

^*p < .05.